REINHARD 



the emphasis has been upon natives as contrasted to Caucasian 

 groups, but in a similar cultural environment in isolated geo- 

 logical survey parties in military and other construction groups, 

 there is the same phenomenon. I have been clinically associated 

 with medicine for fifteen years in this area. The fact is that 

 when, on the rare occasion, the Caucasian lives in the same 

 socio-economic status as the native, the pattern is very similar 

 to that you describe. 



REINHARD: Yes, right. And if you compare, say, the Alaska 

 natives with the residents of Cairo, the situation is quite similar. 



CAMPBELL: I want to bring up one question relative to the 

 persistence of virus in relation to organic composition or the 

 amount of organic material. I was just wondering whether this 

 is actually a persistence or perhaps a growing; is it static or 

 dynamic ? 



REINHARD: The organism is static. These were viability 

 tests. 



CAMPBELL: There is something in the high organic environ- 

 ment that stabilizes it. 



REINHARD: Evidently, We could look back, for instance, to 

 the protective action of colloids. In organic contamination by 

 sewage, you probably have a few cations. Another factor, too. 

 Dr. Campbell, is the fact that particularly in sewage, where there 

 is an excessive amount of organic content, the aerobic biological 

 activity is decreased. This is evidently a conditioning factor, 

 for where there is a great amount of aerobic biologic activity, 

 the virus just does not last very long, but when the environ- 

 ment becomes anaerobic or abiotic, then the virus may last 

 a long while. For instance, in distilled water, the virus via- 

 bility is greatly increased. Does that answer your question? 



CAMPBELL: Not entirely, no. You really have to do an ex- 

 periment, of course, and have those cells present. 



REINHARD: The people at Sanitary Engineering Center were 



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